Re: [squid-users] Questions Cache-digest

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2011/8/4 igor rocha <igorlogos_at_gmail.com>:
> Amos,
> I think  ve  done  the changes according to their observations. And
> for my studies no longer have anything to adiconar, yet this file with
> digests results have shown me and make me believe they have something
> wrong. Could analyze the current scenario, and point out errors or
> faults again ?!
>
> RAM
> #cache_mem 16 MB
> cache_mem 128 MB
> maximum_object_size_in_memory 64 KB
> # HD
> #cache_dir aufs /var/spool/squid 512 16 256
> cache_dir aufs /var/spool/squid 512 16 256
> #maximum_object_size 128 MB
> maximum_object_size 16 MB
> minimum_object_size 0 KB
>
> # Cache Threshold limits
> cache_swap_low 90
> cache_swap_high 100
> #log_icp_queries on
>
> #Scenario Cache-digest
> #cache_peer 192.168.15.200 parent 3128 3130
> cache_peer 192.168.15.201 parent 3128 3130
> cache_peer 192.168.15.202 parent 3128 3130
> cache_peer 192.168.15.203 parent 3128 3130
>
> #Tags cache-digest
>
> digest_generation on
>
> digest_bits_per_entry 5
>
> digest_rebuild_period 3600 s
> digest_rewrite_period 3600 s
>
> digest_rebuild_chunk_percentage 10
> digest_swapout_chunk_size 4096  bytes
>
>
> #icp_port 3130
> #prefer_direct off
>
> # Cache Uploads
> refresh_pattern ^ftp: 1440 20% 10080
> refresh_pattern ^gopher: 1440 0% 1440
> refresh_pattern . 0 20% 4320
>
> # Basic configuration
> http_port 3128 transparent
> visible_hostname mc2-node01
>
> acl cloud src 192.168.15.0/24
> #icp_access allow cloud
> acl all src 0.0.0.0/0.0.0.0
> #icp_access deny all
> http_access allow all
>
> Grateful!
>
>
>
>
>
> 2011/7/21 igor rocha <igorlogos_at_gmail.com>
>>
>> Thanks !
>>
>> 2011/7/20 Amos Jeffries <squid3_at_treenet.co.nz>:
>> > On Wed, 20 Jul 2011 10:48:16 -0300, igor rocha wrote:
>> >>
>> >> Helo,
>> >> I have many doubts about the operation and monitoring Cahe-digests.
>> >>
>> >> I do not know how to access the summaries created by the same, as I do?!
>> >
>> >  http://$visible_hostname/squid-internal-periodic/store_digest
>> >
>> > Its a compacted binary hash, so all you find out by requesting it is whether
>> > the peer is providing it, and maybe when it was Last-Modified.
>> >
>> >>
>> >> I do not know how to ensure that all cache servers are utilising and
>> >> swapping the summary cache_digests between them , is need  a tag
>> >> referencing she?
>> >
>> > You will see HTTP requests for the URL above being made between them. From
>> > each squid to each of its peers for their individual digest.
>> >
>> >>
>> >> The cache-digests is only an information exchange protocol between the
>> >> caches that have to be used with a architecture of a squid (mesh,
>> >> hierarquic, multicast)?
>> >
>> > It is a compressed form of the cache index hashes. The format and
>> > construction is publicly available so there is nothing preventing other
>> > cache software from providing digests which Squid can fetch. There are also
>> > several caching softwares based on Squid which contain it.
>> >
>> >>
>> >> Looking at my scenario,  you can point my errors.
>> >> RAM
>> >> #cache_mem 16 MB
>> >> cache_mem 128 MB
>> >> maximum_object_size_in_memory 64 KB
>> >> # HD
>> >> #cache_dir aufs /var/spool/squid 512 16 256
>> >> cache_dir aufs /var/spool/squid 512 16 256
>> >> #maximum_object_size 128 MB
>> >> maximum_object_size 16 MB
>> >> minimum_object_size 0 KB
>> >> # Cache Threshold limits
>> >> cache_swap_low 90
>> >> cache_swap_high 100
>> >> #log_icp_queries on
>> >> # Scenario 4. cache_didests
>> >> #cache_peer 192.168.15.200 parent 3128 3130 roun-robin
>> >> cache_peer 192.168.15.201 parent 3128 3130 digest-url= 192.168.15.200
>> >> 192.168.15.202 192.168.15.203
>> >
>> > Only set digest URL if it is an unusual location (ie not the URL I mentioned
>> > up above).
>> >
>> > Also " 192.168.15.200 192.168.15.201 192.168.15.203" is not a URL.
>> >
>> > I think you need to remove the whole attempt at configuring digest-url
>> > option from the cache_peer lines. The defaults should work.
>> >
>> >
>> >> cache_peer 192.168.15.202 parent 3128 3130 digest-url= 192.168.15.200
>> >> 192.168.15.201 192.168.15.203
>> >> cache_peer 192.168.15.203 parent 3128 3130 digest-url= 192.168.15.200
>> >> 192.168.15201 192.168.15.202
>> >>
>> >> #Tags cache-digest
>> >> digest_generation on
>> >> digest_bits_per_entry 5
>> >> digest_rebuild_period 3600
>> >> digest_rewrite_period 3600
>> >> digest_rebuild_chunk_percentage 10
>> >> digest_swapout_chunk_size 4096  bytes
>> >>
>> > <snip>
>> >
>> > Amos
>> >
>
Received on Mon Aug 08 2011 - 22:53:28 MDT